Oil burner



Aprii 22, 1930.

s. E. JACOBSON 1,755,602

OIL BURNER Filed Sept 9, 1926 2 Sheets-Sheet 1 I April 22, 1930. G. E. JACOBSON 0 IL BURNER Filed Sept. 9, 1926 2 Sheets-Sheet 2 IN V EN TOR.

i and be in the path of the flames which are thus caused to issue between saidcoil and the air manifold. A supply pipe 20 is shown connecting with the bottom convolution of said coil 19, this supply pipe leading from' a suitable source of water supply such as a city water main (not shown), and the upper convolution of coil 19 is joined by a pipe 21 and a needle valve 22 to the steam injecting nozzle 2. Said needle valve preferably has i a stem 222 which passes outwardly through a suitable sleeve .43 and packing 2st to the exterior of the furnace where it maybe manually controlled by the operator through any suitable agency, such as a handle 25. Heat from the flame will cause the water in the coil to turn to steam and this steam is fed down through pipe 21 and needle valve 22 to the nozzle 2. It may be here noted that said'nozzle is exteriorly screw-threaded and adjustable into or out of the injection chamber. This adjustment. however, is made in setting up the apparatus and need not be changed thereafter. A locknut 26 secures the nozzle in its adjusted position.

Similarly, thefuel supply nozzle 3 is screwthreaded and provided with a lock nut 27' for obtaining a fixed adjustment of the nozzle. Fuel may besupplied to this nozzle froma suitable source, preferably at a steady or even pressure of any'sort. As one way of securing such a feed, I have shown a gravity feed through a pipe 28 and a float valve tank 29 having afloat 30 and stop valve 31 which will act tomaintain a constant level of fuel in said tank 29, which is preferably outside of the furnace at some convenient place and fixedly supported at the proper level.

Note may be made of the fact that after the burner is once started in operation, it is 7 regulated wholly by the single steam control needle valve 22. Also, the steam nozzle 2 is in alineinent with the burner tube 5 so'the steam jet will pass directly up said tube and draw the fuel and heated air with it tothe top of said tube into the mixing chamber.

The .fuel supply, nozzle 3 is at an angle or inclined to the line of discharge of the steam nozzle 2 and is shown adjusted longitudinally with its outlet at saidline ofdischarge'.

.f. However, it can be backed'away orthe steam nozzle 2 can be backed away or advanced, as

.necessary to secure the desired action of steam.

and fuel. It will be noted that the steam and fuel first combine and then by their passage into the tube 5 draw in such air as is needed from the injection chamber, to which it is supplied by the inlet pipe 4:, though not under pressure or from a jet or nozzle. By my construction a proper adjustment in position of the fuel nozzle and steam nozzle,

"relative to each other, will result in an automaticinduction of the proper amount of air after the steam jet has taken up the proper amount of fuel. The steam jet is the onl one'of the three supplies under pressure, and as has been stated, the entire feed is regulated by regulating the steam jet by means of the valve 22.

Preferably the hood 6 is provided with a plurality of interior vanes 32, herein shown as crescent shaped, said vanes resting upon the upper end of the tube 5 and hub 81, and said hood being held down in place by bolts 33 through said vanes into said hub. The

injected gases strike the top of the hood and are deflected outwardly with a whirling motion caused by said vanes 32, thus causing the said. gases to become thoroughly mixed before passing down to the shelf 8 for combus: tion. 7

In making installation of the burner'in a furnace of ordinary make, the usual furnace grate is omitted or removed and preferably replacedby a plate 34 having an opening of appropriate size to substantially fit around theair manifold 15 and prevent an influx of cold air between said manifold and the wall 35 of the ash-pit of the furnace. Furthermore, the burner may be suitably supported in any desired way, and in the drawing 1 have shown a base or stand 36 adapted to rest upon the floor of the ash-pit and secured to asuitable part of the burner, such as to the discharge pipe 18 from the manifold.

Obviously detail changes and modifications may be made in the construction, operationand'use of my in'iprovedoil burner, by those skilled in the art, without' departing from the spirit and scope of the invention, and I do not wish to be understood as limit ing myself herein except as set forth in the following claims when construed in the light of the prior art. j

Having thus described the invention, what I'claim is:

1. An oil burner comprising means for injecting ingredients to form a combustible mixture, means formixingl said ingredients, asloping shelf'on which to burn the mixture, adrip pan at. the lower edge of said shelf, a manifold extending peripherally around saiddrip pan, and means for obtaining auxilary supplies of air between the shelf and drip fold.

2. An oil burner comprising a central hood, a shelf beneath said hood. on which combuspan and between the drip pan and man'ition takes place, a steam coil around said hood, a manifold at the outer edge of sald shelf, and means for mixing oil with steam hood.

from said steam pipe and air from said air manifold and conducting the mixture to said 3. An oil burner comprising a central hood.

a shelf beneath said, hood on which combusa shelf beneath said hood'on which combus-,

tion takes place, a steam coil around said hood, a manifold at the'outer edge of said shelf, means for obtaining an auxiliary supply of air between said shelf'and drip pan and between the drippan and air manifold, and means for mixing oil with steam from said steam coil and air from said air manifold and conducting the mixture to said hood.

5. In an oil burner, the combination with a burner tube, of a hood mounted thereon and providing a downward extending annular passage around said burner tube, and an annular series of vanes centrally disposed at the interior of said hood and resting at their edges upon the end of the burner tube to support said hood so that the fuel mixture must pass from the said tube to said annular passage through said vanes.

6. In an oil burner, the combination with a central shelf and means for supplying fuel thereto for combustion, of an annular drip pan around said shelf, the adjacent edges of said shelf and drip pan providing an air gap, and vanes in said air gap disposed obliquely thereof and integral with said shelf and drip pan to connect the same.

7. In an oil burner, the combination with a central shelf and means for supplying fuel thereto for combustion, of an annular drip pan around said shelf, a manifold around said drip pan, said drip pan providingair gaps between its edges and said shelf and manifold, and vanes in said. air gaps disposed obliquely thereof, the vanes between the shelf and drip pan being integral therewith to connect them and the vanes between the manifold and drip pan being integral with the latter and forming a seat for the former.

8. In an oil burner, the combination with l a central shelf and means for supplying fuel thereto for combustion, of an annular drip pan around said shelf,'a manifold around said drip'pan, said drip pan providing air gaps between its edges and said shelf and manifold, and vanes in said air gaps disposed obliquely thereof, those in one gap being slanted in the same circumferential direction as those in the other gap so as to give sitel'y through" said gaps;

a whirling motion to theair enterin'g oppo- In oil burner; the combination :of an upright burner tube having a"w1'de.annu'lar top, means for supplying a mixture :Of fuel gasses tothe lower end ofsaid tub'e,;a'hood "upon said tube :depend-ing therearound to form an annularoutletsand hav ng at its cen- -'ter an-annular series of interior vanes'restiigngupon the top of the tuheand forming with said :top radial" tubular passages leading to saiel'outl'et, and "means belowsaid outlet from which combustion takes .pl'ace..l

at its center an annular series of interior vanes resting upon the top of the tube and forming with said top radial tubular passages leading to said outlet, and an annular outwardly extending shelf below said outlet from which combustion takes place.

11. In an oil burner, the combination of an upright burner tube, an annular shelf having a central upwardly extending tubular portion with a thickened top fitting upon the outside-of the top of said burner tube flush therewith, means for supplying a mixture of fuel gasses to the lower end of said tube, and a hood upon the burner tube and tubular portion of the shelf depending therearound to form an annular outlet and having at its center an annular series of interior vanes resting upon the tops of said burner tube and tubular portion of the shelf and forming with said tops radial tubular passages leading to the space between said hood and tubular portion of the shelf, said hood terminating short of said shelf to discharge the fuel onto said shelf for combustion.

12. An oil burner having a central outwardly overhanging steam generator, an an nular combustion shelf beneath said overhanging steam generator, central means for mixing steam, fuel and air and conducting the mixture to said shelf, an upwardly extending annular member outside said shelf to form a combustion chamber, and means for admitting air at the inner side of said memher and outside said shelf.

13. An oil burner having a central outwardly overhanging steam generator, an annular combustion shelf beneath said overhanging steam generator, central means for mixing steam, fuel and air and conducting the mixture to said shelf, an upwardly extending annular member outside said shelf to form a combustion chamber, an annular passage for admitting air at the inner side of said memher and outside said shelf, and vanes in said passage disposed obliquely thereof.

141. An oilburner having a central out- Wardly overhanging steam generator, an annular combustion shelf beneath said overhanging steam, generator, central means for mixing steam, fuel and air and conducting the mixture to said shelf With a rotary motion, an upwardly e'xtendingannular member outside said shelf to form a'combustion chamber, an annular passage for admitting air to the inner side of said member and outside said shelf, and vanes in said passage disposed obliquely thereof to give thelair a rotary motion in the same direction as the fuel mixture.

GUSTAF E. JACOBSON; 

